See https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1167414/comments/5:
> The bug started to appear to me after the system asked me "Do you want to install the yahoo mail whatever in order to have > better and faster access to your email" After that thing everything starting to collapse
So this is not a Firefox bug
See https:/ /bugs.launchpad .net/ubuntu/ +source/ firefox/ +bug/1167414/ comments/ 5:
> The bug started to appear to me after the system asked me "Do you want to install the yahoo mail whatever in order to have
> better and faster access to your email" After that thing everything starting to collapse
So this is not a Firefox bug